public async Task LazyLoading_NoFilters_Test()
{
using (var context = new TestDbContext(_dbOptions))
{
await FakeDataGenerator.AddFakeDataAsync(context);
}
using (var lazyContext = new LazyLoadingTestContext(_dbOptions))
{
WriteLine("\n=======================");
WriteLine("LAZY LOADING NO FILTERS");
WriteLine("=======================\n");
var parent = await lazyContext
.Parents
.FirstOrDefaultAsync();
Assert.NotNull(parent);
Assert.NotEmpty(parent.Children);
Assert.Equal(FakeDataGenerator.ChildrenCount, parent.Children.Count());
}
}
public async Task LazyLoading_OutsideContext_Exception_Test()
{
using (var context = new TestDbContext(_dbOptions))
{
await FakeDataGenerator.AddFakeDataAsync(context);
}
ParentEntity parent;
using (var lazyContext = new LazyLoadingTestContext(_dbOptions))
{
WriteLine("\n=======================");
WriteLine("LAZY LOADING NO FILTERS");
WriteLine("=======================\n");
parent = await lazyContext
.Parents
.FirstOrDefaultAsync();
}
Assert.NotNull(parent);
Assert.Throws <InvalidOperationException>(() => parent.Children.Count);
}
public async Task LazyLoading_WithFilter_Test()
{
using (var context = new TestDbContext(_dbOptions))
{
await FakeDataGenerator.AddFakeDataAsync(context);
}
using (var lazyContext = new LazyLoadingTestContext(_dbOptions))
{
WriteLine("\n========================");
WriteLine("LAZY LOADING WITH FILTER");
WriteLine("========================\n");
var parent = await lazyContext
.Parents
.FirstOrDefaultAsync();
var filteredChildren = parent.Children.Where(ch => ch.Int64Property > 0).ToArray();
Assert.NotNull(parent);
Assert.NotEmpty(filteredChildren);
Assert.Equal(FakeDataGenerator.ChildrenCount - 1, filteredChildren.Count());
}
}